Electrode



Pm Ma a, 1923.

UNITED STATES WILLIAI IBBY, OF LYNN, MASSACHUSETTS, ASSIGHOB '10 (1mm BLBC'I'RI COMPANY, A CORPORATION 01' NEW YORK.

ELECTRODE.

30 Drawing. I

connection with a luminous arc in which the candle power operation and life of the electrode are materially increased and improved. v It is common practice to make flaming arc electrodes by using a mixture of ilmenite,

chromite, and magnetite, but to this combination of elements I propose to add -a small percentage of sodium fluoride and lithium fluoride as a flux.

I find that when lithium fluoride is used together with sodium fluoride as a double flux-in an electrode made up of ilmeuite, chromite and a small amount of magnetite, the combination makes an electrode that has a more desirable candle power operation and life than when either of these ingredients are used separately. I It. will be understood that the ingredients of the electrode may be varied somewhat. However, as a specific illustration,

Application fled January 7, 1927. Serial 10. 159,740.

I give the following proportions of the ingredients Per cent. Ilmenite -s- "76.5 Chromite 5.5 Magnetite 17.22 Sodium fluoride"; 0.28 Lithium fluoride ..0.50

I do not wish to be strictly limited, how 40 ever, to the exact proportions given inas-- much as in view of the disclosure variations may be made in the proportions without departing from the spirit of the invention or the scope of the claims contained herein.

\Vhat I claim as new and desire to secure by Letters Patent of the United States, is:

1. An electrode for an electric are con-- sisting of the following ingredients: ilmenite, chromite, magnetite, sodium fluoride and lithium fluoride. y

2., An electrode for an electric are comprising the following ingredients: ilmenite. magnetite, lithium fluoride and a flux of sodium fluoride.

3. An electrode for an electric arc consisting of the following ingredients: ilmenite :4'6.5%, chromite 5.5%, magnetite 17.22%, sodium fluoride 0.28%, and lithium fluoride 0.50%.

In witness whereof, I have hereunto set my hand this fifth day of January, 1927.

\VILLIAM IRBY. 

